>>> I want the calendar to understood "every full moon".
>
>> Doesn't the moon cycle on a 28 (??) day schedule? You could just create a
>> recurring event...
On average, it's 29.530589 days, but who's counting? ;-)
Still...it's short cuts like these that, in 46 BC, led to the Romans having
a 445 day year. ;-)
>From <http://www.treasure-troves.com/astro/Lunation.html>
> The mean time for one lunar phase cycle (synodic period of the Moon) is
> 29.530589 days, or 29 days, 12 hours, 44 minutes, 3 seconds. This is the
> length of the synodic period of the Moon. However, as a result of torques from
> the Sun, the actual time interval between consecutive New Moons, or
> "lunation," varies greatly. Meeus (1988) gives a table of the shortest (29
> days 06 hours 35 minutes) and longest (29 days 19 hours 55 minutes) lunations
> from 1900 to 2100.
mikel
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